Vehicle ventilator



July 20, 1926. 1,592,841

I.D.ANSELL VEHICLE VENTILATOR Filed Dec. 26, 1924 fi muif/ Ira/1 5.1412561] Patented July 20, 1925.

UNITED STATES PATENT OFFICE.

IVAN D. ANSELL, OF MINNEAPOLIS, MINNESOTA.

vnnxcnn VENTILATOR.

Application filed Pecember. 2a, 1924; Serial no. 758,088.

My invention relates to a ventilating de vice which is in the nature of an improvement on my pending application'vehicle ventilator filed June 18, 1924, under Serial N umber 7 20,808, and which has matured into Patent-N umber 1,539,534, dated Ma 26,

1925. This type of ventilator is adapte for general use on enclosed veh'icles'but is especially adapted for application to the roof of a motor bus. Such a ventilating device is operative under the actionof suctionor partial vacuum to draw the foul air from the top.of

- and defined in the claims.

, In the accompanying drawings, which illustrate the invention, like characters indicatelike parts throughout the severalviews.

Referring to the drawings:

Fig.1 is a plan view of the improved ventilating device with some partsbroken away and sectioned and applied to the roof of a motor bus; 7

Fig. 2 is a longitudinal vertical section taken on the line 2-2 of Fig. 1;

ig. 3 is a transverse vertical section taken on the line 3-3 of Fig. 2, on an enlarged scale; and k Fig. 4 is 'a fragmentary detail view in section taken 'on the line (2Q an enlarged scale.

In the" drawings, the numeral 5 indicates what maybe presumed to be the roof of a motor bus to which one of the improved ventilating devices is applied, but it is of course understood that said device. may be applied elsewhere, as for example to the side of a vehicle, and one or more thereot may be used depending on theamount of ventilation required.

. The improved ventilating device, as shown,-includes a shell-like body 6 stamped from a single sheet of metaland a bottom plate 7 for said shell which isjormed from a single sheet of metal. This body 6 flares rearwardly in vertical section, and at its front end comes nearly to an edge, and its sides flare rearwardly from the clo'sedfront passage in the roof 5.

'6 is a. swingin end of said body toward the open and relatively large rear end thereof. The lower eglge portion of the sides and front end of t e an anchoring flange 8 which rests directly on the bottom plate 7 and is permanently secured thereto by spot welding, as indicated at 8". The edge portion of the anchoring flange 8 is turned downward to form a short depending flange 9 which overlaps the edges of the bottom plate 7. This depending flange 9 not only materially assists in holding the bottom plate 7 in position in respect to the anchoring flange 8, but it gives the ventilating device a neat and finished appearance.

The ventilating device is secured to the bus roof 5 by W0 (1 screws 10 inserted through bores in the anchoring flange 8 and bottom plate 7 and turned into said roof. In place of these wood screws 10, belts or 1 other fastening devices may be used, which when tightened, draw the bottom plate 7 .tightly against the roof 5 or its covering to form a water-tight joint between the ventilating, device and roof. I

The bottom plate 7, at its front edge por-' tion, is cut away or formed with a large air intake opening 11 that registers with an air Just rearward of the opening 11, the bottom plate 7 is formed with an upstanding baflle flange 13 that extends completelyacross the body 6 and is secured to the sides thereof and prevents water from running from the roof 5 into the vehicle through the co-incident'openings 11 and 12. 1

To permit the escape of water which may be stopped by; the'bafile flange 13, there is formed in the sides of the body 6 just back of said flange and close to the bottom plate 7,

body 6 are turned outward to afford lateral drain or water discharge passages 14. a

The bottom plate 7 extends materially rearward of the top of the body-6 and the rear ends of the sides of said body extend gbliquel from said top to the bottom plate from the top of the body drearwardly and (lownwardly'along the oblique rear edges of :the sides of said body and are integrally formed with said top and sides. Below this bafile flange 15, the body 6 is formed with a rear and air discharge passage 16. 7

Extending transversely through the boil damper or chec 17, which, as shown, is in A epending baiile flange 15 extends gravity closed back dra.

- just enough clearance to swing reely and rearward from said flange.

The lower edge portion of the damper 17 is folded to form in its front face a horizontally extended channelfQO in which is mounted a joint strip 21 of rubber or other suitable material. This joint strip'21 engages the back of the bathe flange 13 as a stop and forms a weather tight joint between the damper 17 and said bafile flange. Hy

making this joint strip 21 of rubber or other llexible material, the action of the damper 17 is noiseless when stopped by the baffle flange 13 during the closing movement of said damper.

It will be noted that the shell above described has an approximately flat top so that said shell in all longitudinal sections has approximately the same inclination or pitch. Also, it will be noted that the air passages 11 and 12are not round but approximately rectangular in plan. These features combine to give the shell approximately the same air conducting capacity at its various vertical longitudinal sections, that is,.for instance, at its longitudinal center and at its longitudinal sides. Moreover, it will also be noted that the opening 16 at the rear end of the shell and the air passage in the shell.-

above the bafile flange 13 are approximately rectangular so that the air will be discharged about equally at its various different vertical cross sections. This prevents concentration of a central stream of air and increases the efficiency of the ventilator.

Under forward movement of the vehicle, the shell, because of its forward inclination or gradual rearward rise, will cut its way through the air under very slight resistance and" will raise the air and spread the same laterally, thereby producing a partial vacuum in the vicinity of the discharge opening 16 and this will produce a partial vacuum within the shell and hence an outward flow of foul air from the vehicle. In a rain storm very little water will be dashed into the shell under the depending baflle flange 13,

\Vhen'the ventilating device is functioning, the partialvacuum therein and the draft, of air therethrough will hold the damper 17- open, but which damper will automatically close under the action of a back draft or sudden gust of wind and thereby drafts in the vehicle.

It will also prevent'rain or snow from being blown over its baflle flange 13 and into the vehicle. A

prevent The efficiency of the device has been i thoroughly demonstrated in practice. The simple character of the device makes it easy to manufacture and of low manufacturing cost and, as is obvious, the device may be very easily installed on a bus, car, or any other enclosed moving vehicle.

What I claim is:

l. A ventilator comprising a rearwardly flaring shell having top, sides and bottom, a bafile declining rearwardly of said top and providing an outlet opening with said-bottom, said bottom having an inlet opening at its forward portion, an upwardly extending bafl'le flange at the rear edge of said opening, a balanced damper suspended in the casing at a point substantially midway the ends of said top, the lower end of saiddamper co-operating with said bafile flange tonormally close the shell between the. openings, whereby air may be exhausted through said ventilator and back draft therethrough prevented. l

2. A ventilator comprising a shell having top, sides and bottom, a rear baffle at said top and providing an outlet opening with said bottom, said bottom having an inlet" opening at its forward portion, an upwardly extending baflle flange at the rear edge of said opening,'a balanced damper suspended in the casing at a point substantially midway the ends of said top, the lowerend of said damper co-operating with said baflle flange to normally close the shell between the openings, whereby air may be exhausted through said ventilator and back-draft therethrough prevented.

In'testimony whereof I atlix my signature.

IVAN. D. ANSELL. 

